Photosynthesis Review
What is it called?
DESCRIPTION
Organisms that can make their own
food
Organisms that obtain energy from
the food they eat
GIVE 2 EXAMPLES
All organisms get the ENERGY they need to regenerate ATP from __________________________
A. phosphates
C. organelles
B. foods like glucose
D. ADP
Which of the following are TRUE about ATP?
A. ATP consists of ribose sugar, adenine, and 3 phosphate groups
B. ADP forms when ATP loses a phosphate and releases energy.
C. Used ATP is discarded by the cell as waste.
D. ATP provides energy for active transport in cells.
Plants gather the sun’s energy with light-absorbing MOLECULES called __________________.
A. thylakoids
C. chloroplasts
B. pigments
D. glucose
Chlorophyll absorbs light very well in the _______________ regions of the visible spectrum.
(Circle all that are true)
A. blue-violet
C. red
B. green
D. yellow
Most plants appear green because chlorophyll _________________________________________.
A. reflects green light
B. absorbs green light
A student conducts an experiment by collecting the gas given off by a green plant in bright sunlight at room temperature. The gas
being collected is probably ___________________.
A. ATP
C. carbon dioxide
B. water vapor
D. oxygen
The Calvin cycle is another name for __________________________
A. photosynthesis
B. the electron transport chain
C. light-dependent reactions
D. light-independent reactions
CIRCLE ALL THAT ARE TRUE about the LIGHT DEPENDENT REACTION.
A. High-energy electrons move through the electron transport chain.
B. Pigments in photosystems II and I absorb light.
+
C. ATP synthase helps H ions in the thylakoid space to pass through the membrane to the stroma.
D. ATP and NADPH are used to produce high-energy sugars.
CIRCLE ALL THAT ARE TRUE about the CALVIN CYCLE
A. ATP is produced by ATP synthase and oxygen is released
B. It is also called the light-independent reaction.
C. ATP and NADPH from the light-dependent reactions are used here
D. High energy sugar compounds are made from CO2
Which molecule acts as a carrier for high energy electrons during photosynthesis?
A. ATP
B. H2O
+
C. NADP
D. CO2
How is the Calvin cycle different from the light-dependent reactions?
A. It takes place in chloroplasts.
B. It takes place in the stroma.
C. It requires light.
D. It takes place in the thylakoid membrane
Oxygen produced during the light-dependent reaction is __________________________.
A. used in the Calvin cycle to make sugar
B. joined with the NADPH to make water
C. is released into the atmosphere
D. None of these, oxygen is NOT produced by the light-dependent reaction
USE THE LETTERS IN THE DIAGRAM AT THE LEFT TO IDENTIFY:
LIGHTDEPENDENT
REACTIONS
CALVIN
CYCLE
LOCATION
REACTANTS
______ stroma
PRODUCTS
______ thylakoid
LIGHT?
______ granum
THINK ABOUT IT:
Which of these graphs represents the effect of temperature on the rate of
photosynthesis? ______
(Hint: Many molecules that help with photosynthesis are enzymes)
EXPLAIN YOUR ANSWER. ___________________________________________________________
Which of these graphs represents the effect of light intensity on the rate of photosynthesis? ______
EXPLAIN YOUR ANSWER. ______________________________________________________________